BY WALTER W. FHOGGATT. 83 



large, smooth, and shining, truncate at the base, and rounded 

 towards the jaws; thorax narrow, smooth and shining; abdomen 

 short, rounded and pointed towards the tip. 



DIPTERA. 

 Orthoprosopa nigra, Macq. 



(Plate IX., figs. 6-8.) 



Larva 8 lines in length, dirty white to brownish, rounded at 

 the head, widest about the centre, tapering towards the tip of 

 abdomen which is produced into a stout horny ochreous appendage 

 truncate at the tip and armed at the base with a short fleshy 

 spine on either side. 



The maggots, frequently in great numbers, are found living in 

 the slime and putrid water which accumulates between the outer 

 shell and the caudex of the dead stem, about midwinter; numbers 

 kept under observation remained about six weeks before changing 

 into pupje. The latter were simply the skin of the maggot 

 hardened into a brown oval case covered with particles of earth 

 attached to it, and the anal appendage shortened and retracted. 



This handsome fly (one of the Syrphidce) is 7 lines in length, 

 shining black, with the antennfe and face bright yellow; thorax 

 covered with a very short fine blackish down and ornamented 

 with a pair of rounded naked black spots in the centre; wings 

 slightly fuscous, legs black; abdomen stoutest at the base, rounded 

 towards the tip. 



Orthoprosopa sp. 



(Plate IX., figs. 9-11.) 



Larva dirty white, 10 lines in length, but able to I'etract or 

 extend its segments considerably; head rather truncate in front, 

 with the sides round, narrow, with segments of uniform size, 

 tapering towards the tip which is produced into a slender fleshy 

 tail; two-thirds of the length of the whole of the body terminating 

 in a slender horny tube or spine, truncate at the tip. 



